------------------From: Brice Goglin <brice@myri.com>part of commit 0dcffac1a329be69bab0ac604bf7283737108e68 upstream(the upstream multislice patch contains the same fix within myri10ge_alloc_slices() which does this for every slice)

Even if we don't have multiple slices in myri10ge in 2.6.26,we already use some multislice-aware routines that need theslice state pointers to mgp and dev to be valid.

This patch fixes a regression where configuring the interface upwould oops in myri10ge_allocate_rings() when using ss->mgp(and later when using ss->dev).